Will have a bash of this tonight, thanks for sharing. The history of the Oliver brothers on that page is very interesting and worth a read too, the 8bit home computer scene was fascinating.
Incidentally I saw this the other day, it's a free eBook about the development of R-Type on the Speccy if anybody is interested:http://bizzley.com
GPD Win, GPD XD 64gb, PlayGo, RS-90, 3DS XL, DSi XL, GBA SP, GBBC Clone, Gameboy Pocket, PSP Go
Medion Erazer, Toshiba Z20t, Dell Mini 9, Psion 5MX
Tons of other old laptops and tablets.....